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Aug 27, 2012 at 10:28 vote accept user25266
Aug 24, 2012 at 22:04 answer added user21574 timeline score: 2
Aug 6, 2012 at 8:24 comment added user25266 Thanks for responses. @AndrásBátkai I saw it in a book (books.google.co.uk/books/about/…). For $k=0$ and $k=2$ at least, it agrees with Krylov's definitions.
Aug 6, 2012 at 1:20 comment added Otis Chodosh You should try amazon.com/Partial-Differential-Equations-Parabolic-Mathematics/…
Aug 5, 2012 at 22:16 comment added András Bátkai Do you have a reference for this definition? Is it in a paper?
Aug 5, 2012 at 18:15 history asked user25266 CC BY-SA 3.0